L R AS Published on Saturday 16 September 2023 - n° 457 - Categories:other methods
An underground storage system more competitive than lithium ion!
US company Sage Geosystems says its Earthstore underground storage system can provide 18 hours or more of storage capacity, not including short-term electricity. The solution would be competitive
in terms of cost compared with lithium-ion batteries and advanced natural gas plants.
The data was obtained by pumping and pumping back water from a well to assess the capacity and duration of the energy. According to the company, no induced seismicity was measured either during fracturing or during subsequent pumping operations.
The device has also shown that it can deliver high-power, short-duration energy during peak periods. On a discounted cost of storage (LCOS) basis, EarthStore can provide electricity at a lower cost than lithium-ion battery storage and traditional pumped-storage hydroelectricity.
The device produced 200 kW for more than 18 hours (long duration) and 1 MW for 30 minutes (load following), limited only by the piping of the small-diameter rental surface equipment. The measured efficiency of the underground system is between 88% and 94%, with a round-trip efficiency (RTE) estimated at between 70% and 75%.
- The heat of formation expands the bottom fluid and improves the TEN
- Fluid losses were measured at over 2%, decreasing to 1% by the end of the five-week period
- A single well is capable of generating 2 MW to 3 MW of net production
PV Magazine, 14 September 2023
Editor's note This is another innovation that will have difficulty gaining market recognition, given the dominance of lithium-ion technology.
